src/common/credentials.c

   1 /*
   2  * Copyright (C) 2020 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #include <assert.h>
   9 #include <stdbool.h>
  10 #include "credentials.h"
  11
  12 LTTNG_HIDDEN
  13 uid_t lttng_credentials_get_uid(const struct lttng_credentials *creds)
  14 {
  15         return LTTNG_OPTIONAL_GET(creds->uid);
  16 }
  17
  18 LTTNG_HIDDEN
  19 gid_t lttng_credentials_get_gid(const struct lttng_credentials *creds)
  20 {
  21         return LTTNG_OPTIONAL_GET(creds->gid);
  22 }
  23
  24 LTTNG_HIDDEN
  25 bool lttng_credentials_is_equal_uid(const struct lttng_credentials *a,
  26                 const struct lttng_credentials *b)
  27 {
  28         assert(a);
  29         assert(b);
  30
  31         /* XOR on the is_set value */
  32         if (!!a->uid.is_set != !!b->uid.is_set) {
  33                 return false;
  34         }
  35
  36         if (!a->uid.is_set && !b->uid.is_set) {
  37                 return true;
  38         }
  39
  40         /* Both a and b are set. */
  41         return a->uid.value == b->uid.value;
  42 }
  43
  44 LTTNG_HIDDEN
  45 bool lttng_credentials_is_equal_gid(const struct lttng_credentials *a,
  46                 const struct lttng_credentials *b)
  47 {
  48         assert(a);
  49         assert(b);
  50
  51         /* XOR on the is_set value */
  52         if (!!a->gid.is_set != !!b->gid.is_set) {
  53                 return false;
  54         }
  55
  56         if (!a->gid.is_set && !b->gid.is_set) {
  57                 return true;
  58         }
  59
  60         /* Both a and b are set. */
  61         return a->gid.value == b->gid.value;
  62 }
  63
  64 LTTNG_HIDDEN
  65 bool lttng_credentials_is_equal(const struct lttng_credentials *a,
  66                 const struct lttng_credentials *b)
  67 {
  68         assert(a);
  69         assert(b);
  70
  71         return lttng_credentials_is_equal_uid(a, b) &&
  72                         lttng_credentials_is_equal_gid(a, b);
  73 }